Message ID | 20200415033538.43329-1-jingqi.liu@intel.com (mailing list archive) |
---|---|
Headers | show |
Series | fetch the alignment of device dax | expand |
Ping for comments. Hi Paolo, Dan, Joao, Any comments for this series. Thanks, Jingqi On 4/15/2020 11:35 AM, Liu, Jingqi wrote: > This series adds libdaxctl support and fetchs the alignment of > device dax through libdaxctl [1] APIs. > > QEMU uses mmap(2) to maps vNVDIMM backends and aligns the mapping > address to the page size (getpagesize(2)) by default. However, some > types of backends may require an alignment different than the page > size. The 'align' option is provided to memory-backend-file to allow > users to specify the proper alignment. > > For device dax (e.g., /dev/dax0.0), the 'align' option needs to > match the alignment requirement of the device dax, which can be fetched > through the libdaxctl APIs. > > [1] Libdaxctl is a part of ndctl project. > The project's repository is: https://github.com/pmem/ndctl > > Changelog: > v2: Per Paolo and Dan suggestions, fetch the alignment of device dax > through libdaxctl APIs. > > v1: The initial version. > Fetch the alignment through "/sys/dev/char/%d:%d/device/align". > > Jingqi Liu (3): > exec: fetch the alignment of Linux devdax pmem character device nodes > docs/nvdimm: add description of alignment requirement of device dax > configure: add libdaxctl support > > configure | 30 +++++++++++++++++++++++++++ > docs/nvdimm.txt | 9 +++++++++ > exec.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++- > 3 files changed, 92 insertions(+), 1 deletion(-) >